Interruption-free superregenerative receiver frequency calibration circuit and working method
A super-regenerative receiver and frequency calibration technology, which is applied in receiver monitoring, electrical components, transmission systems, etc., can solve the problems of inability to detect frequency offset in time, achieve improved sensitivity and selectivity, accurate calibration, and improve performance indicators Effect
Active Publication Date: 2019-08-02
FUZHOU UNIV
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Problems solved by technology
Although the frequency calibration of the super-regenerative receiver can be realized in the existing technology, it must be required to interrupt the normal receiving process of the receiver and switch to the calibration mode, and then switch back to the receiving mode after the calibration is completed.
Therefore, the current super-regenerative receiver frequency calibration technology cannot detect the frequency offset in time and then perform calibration
Method used
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[0025] In order to make the features and advantages of this patent more obvious and easy to understand, the following specific examples are given together with the accompanying drawings and described in detail as follows:
[0026] Such as figure 1 As shown, this embodiment includes: a high-frequency frequency divider, an oscillation amplitude detection unit, a first delay unit, a second delay unit, a third delay unit, a first cycle counting unit, a second cycle counting unit, a first sample and hold unit, a second sampling and holding unit, a first cycle counting unit, a second cycle counting unit, a phase detector, a control unit and an oscillation tuning circuit.
[0027] Wherein, the high-frequency frequency divider and the oscillation amplitude detection unit are respectively connected to the high-frequency oscillation input signal; the oscillation amplitude detection unit is respectively connected with the first delay unit and the high-frequency frequency divider; the hig...
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The invention provides an interruption-free superregenerative receiver frequency calibration circuit and a working method. The method is characterized in that the circuit comprises a high-frequency frequency divider, an oscillation amplitude detection unit, a first delay unit, a second delay unit, a third delay unit, a first period counting unit, a second period counting unit, a first sampling holding unit, a second sampling holding unit, a first period counting unit, a second period counting unit, a phase discriminator, a control unit and an oscillation tuning circuit. According to the method, accurate calibration of the oscillation frequency of the oscillator in the receiver can be realized without interrupting the receiving state of the superregenerative receiver, so that the sensitivity and the selectivity of the receiver are improved. The scheme can be widely applied to a wireless circuit system based on a superregenerative receiver so as to improve the performance index of the wireless circuit system.
Description
technical field [0001] The invention relates to the field of circuit control, in particular to an interruption-free super-regenerative receiver frequency calibration circuit and a working method. Background technique [0002] How to effectively calibrate the frequency of the super-regenerative receiver is one of the keys to improve the performance of the super-regenerative receiver. Although the frequency calibration of the super-regenerative receiver can be realized in the existing technology, it must be required to interrupt the normal receiving process of the receiver and switch to the calibration mode, and then switch back to the receiving mode after the calibration is completed. Therefore, the current super-regenerative receiver frequency calibration technology cannot detect the frequency offset in time and then perform calibration. Contents of the invention [0003] In view of this, this patent proposes an interruption-free super-regenerative receiver frequency cali...
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IPC IPC(8): H04B1/26H04B17/21
CPCH04B1/26H04B17/21
Inventor 阴亚东
Owner FUZHOU UNIV